I pretty much agree with your post, except I have no experience with Opera.

I do have an annoying redirect virus in firefox. The part that is most annoying is that when I get hits in google instead of just clicking on the hyperlink, I have to copy the hyperlink and paste it in the address, otherwise it redirects - even though I’ve turned on the “ask me to verify redirect”.

It’s gotta be costing Google money since they are not getting credit for a “click through”.